激光通信卫星抗微振动设计策略分析与探讨

Investigating of anti-microvibration design strategies for laser communication satellites: insights from foreign experience

  • 摘要: 激光通信以其高传输速率和强抗干扰性能成为未来空间通信的发展方向;但激光束的窄散角特性对卫星平台的微振动环境条件要求严苛。文章系统梳理了Artemis、OICETS 和 EDRS-C三种国外典型激光通信卫星的抗微振动设计策略;基于对振动谱测试数据的分析得出NASDA谱、ESA谱、JBM-EF ICD谱和LCDE谱4条平台微振动谱线;结合激光通信卫星特点,从组件级扰动力测试、有限元模型修正、系统级微振动试验,以及卫星姿态、振动与激光终端一体化仿真等方面总结抗微振动设计的技术路线;最后提出了提高我国激光通信载荷对卫星平台微振动环境的适应能力的重点工作建议。

     

    Abstract: Laser communication offers high transmission rates and superior anti-interference performance, making it the development direction of future space communication. However, the narrow divergence angle of the laser beam places strict requirements on the micro-vibration environment of the satellite platform. The anti- microvibration design strategies of three representative international laser communication satellites, namely, Artemis, OICETS, and EDRS-C, were reviewed in this paper. Using vibration spectrum test data, four platform microvibration spectrum lines were obtained, including the NASDA spectrum, the ESA spectrum, the JBM-EF ICD spectrum, and the LCDE spectrum. Considering the characteristics of laser communication satellites, the technical route of anti-microvibration design was summarized, which includes component-level disturbance dynamic tests, finite element model correction, system-level microvibration tests, and integrated simulation of satellite attitude, vibration, and laser terminal. Finally, key suggestions were proposed to enhance the adaptability of laser communication payloads developed in China to the satellite platform micro-vibration environment.

     

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